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Launching into Space - Statistics
General Stats
- This quiz has been taken 8 times
- The average score is 9 of 31
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| What are the two most used states of propellant? | Liquid | 83%
|
| Solid | 83%
| |
| What is the name for the velocity required to escape a planet's gravitational field? | Escape Velocity | 67%
|
| Who theorised that if an object was thrown fast enough it would go into a permanent orbit? | Isaac Newton | 67%
|
| Along with the fuel, what must a rocket store for the engines to work? | Oxygen supply | 67%
|
| What force provides the gradual upward lift needed for a rocket to launch? | Thrust | 67%
|
| In the absence of air resistance and other external factors, what is the trajectory of an object's shape? | A parabola | 50%
|
| Who discovered that gravity actually makes all objects fall at the same rate? | Galileo Galilei | 50%
|
| Although upwards thrust is constant, the acceleration of the rocket is never 100% and never constant either. What mass is decreasing which causes this to happen? | The fuel's mass is burning away | 50%
|
| Since gravity also decreases as the rocket rises, what is the overall effect over time on the rocket's acceleration during its full launch? | It increases | 33%
|
| If friction and other external forces didn't exist, when would an onject cease its horizontal motion? | Never | 33%
|
| Which of Newton's Law's of Motion explain why a force of propelled gases downward force the rocket upwards? | The third law | 33%
|
| When in free-fall, what is the value of g forces experienced? | Zero | 33%
|
| g forces are calculated using a division equation, normal true weight is the denominator. What is the numerator? | Apparent weight | 17%
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| What calculation is used to calculate acceleration in terms of final velocity, initial velocity and time? | a=(v-u)/t | 17%
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| a=9.8m/s^2 ____ (because it is a vector). | down | 17%
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| Projectile motion, according to Galileo, has two separate and independant motions that superimpose each other, what are these two motions? (They are perpendicular) | Horizontal motion | 17%
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| How do you calulate apparent weight? | mg+ma | 17%
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| Using simple maths, if an object is rising, its g force value will always be greater than what? | One | 17%
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| The last is in terms of r... | r=ut+1/2at^2 | 17%
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| The equation: Escape velocity = 2Gm(planet)/r(planet) is wrong. What is the right hand side missing? | Square root | 17%
|
| Therefore, when using the above equations for horizontal trajectory only, what single term does u (initial velocity) equal? | v | 17%
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| The second is in terms of v^2 (final velocity squared)... and r=displacement | v^2=u^2+2ar | 17%
|
| Vertical motion | 17%
| |
| What other three equations with 'a' can you use to find values for projectile motion? The first is in terms of final velocity (v)... | v=u+at | 17%
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| The force of thrust must be greater than what other force before a rocket can lift off. | Weight | 17%
|
| What direction would the object travel if the value of g forces was below this number? | Downwards | 0%
|
| When dividing this equation by true weight, ma, the mass values cancel out leaving what equation? | (g+a)/g | 0%
|
| What kind of increase does the velocity have? | Logarithmic | 0%
|
| What types of rockets avoid excessive peaks in g forces? | Multi-stage rockets | 0%
|
| The direction of what can be exploited to gain a boost in velocity when trying to reach orbit? | The Earth's rotation | 0%
|
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